<!DOCTYPE html>
<meta charset="utf-8">
<style>

    .node {
        cursor: pointer;
    }

    .node circle {
        fill: #fff;
        stroke: steelblue;
        stroke-width: 1.5px;
    }

    .node text {
        font: 10px sans-serif;
    }

    .link {
        fill: none;
        stroke: #ccc;
        stroke-width: 1.5px;
    }

</style>
<body>
<script src="resources/js/d3.v3.min.js"></script>
<script>

    var margin = {top: 20, right: 120, bottom: 20, left: 120},
        width = 960 - margin.right - margin.left,
        height = 800 - margin.top - margin.bottom;

    var i = 0,
        duration = 750,
        root;

    var tree = d3.layout.tree().size([height, width]);

    var diagonal = d3.svg.diagonal().projection(function(d) { return [d.y, d.x]; });

    var svg = d3.select("body").append("svg")
        .attr("width", width + margin.right + margin.left)
        .attr("height", height + margin.top + margin.bottom)
        .append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

    d3.json("DataSource/JavaCla.json", function(error, flare) {
        if (error) throw error;

        root = flare;
        root.x0 = height / 2;
        root.y0 = 0;

        function collapse(d) {
            if (d.children) {
                d._children = d.children;
                d._children.forEach(collapse);
                d.children = null;
            }
        }

        root.children.forEach(collapse);
        update(root);
    });

    d3.select(self.frameElement).style("height", "800px");

    function update(source) {

        // Compute the new tree layout.
        var nodes = tree.nodes(root).reverse(),
            links = tree.links(nodes);

        // Normalize for fixed-depth.
        nodes.forEach(function(d) { d.y = d.depth * 180; });

        // Update the nodes…
        var node = svg.selectAll("g.node")
            .data(nodes, function(d) { return d.id || (d.id = ++i); });

        // Enter any new nodes at the parent's previous position.
        var nodeEnter = node.enter().append("g")
            .attr("class", "node")
            .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
            .on("click", click);

        nodeEnter.append("circle")
            .attr("r", 1e-6)
            .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

        nodeEnter.append("text")
            .attr("x", function(d) { return d.children || d._children ? -10 : 10; })
            .attr("dy", ".35em")
            .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
            .text(function(d) { return d.name; })
            .style("fill-opacity", 1e-6);

        // Transition nodes to their new position.
        var nodeUpdate = node.transition()
            .duration(duration)
            .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });

        nodeUpdate.select("circle")
            .attr("r", 4.5)
            .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

        nodeUpdate.select("text")
            .style("fill-opacity", 1);

        // Transition exiting nodes to the parent's new position.
        var nodeExit = node.exit().transition()
            .duration(duration)
            .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
            .remove();

        nodeExit.select("circle")
            .attr("r", 1e-6);

        nodeExit.select("text")
            .style("fill-opacity", 1e-6);

        // Update the links…
        var link = svg.selectAll("path.link")
            .data(links, function(d) { return d.target.id; });

        // Enter any new links at the parent's previous position.
        link.enter().insert("path", "g")
            .attr("class", "link")
            .attr("d", function(d) {
                var o = {x: source.x0, y: source.y0};
                return diagonal({source: o, target: o});
            });

        // Transition links to their new position.
        link.transition()
            .duration(duration)
            .attr("d", diagonal);

        // Transition exiting nodes to the parent's new position.
        link.exit().transition()
            .duration(duration)
            .attr("d", function(d) {
                var o = {x: source.x, y: source.y};
                return diagonal({source: o, target: o});
            })
            .remove();

        // Stash the old positions for transition.
        nodes.forEach(function(d) {
            d.x0 = d.x;
            d.y0 = d.y;
        });
    }

    // Toggle children on click.
    function click(d) {
        if (d.children) {
            d._children = d.children;
            d.children = null;
        } else {
            d.children = d._children;
            d._children = null;
        }
        update(d);
    }

</script>
<a href="logout.do">logout</a>
</body>